Pachycephalosaurus wyomingensis was the largest of the pachycephalosaurids—"thick-headed dinosaurs"—which featured extremely thick skullcaps. The top of a Pachycephalosaurus skull could be 9 ...

Pachycephalosaurus, the delicately built, 15-foot-long, dome-headed dinosaur that lived alongside Tyrannosaurus and Triceratops, is a staple of children’s books and popular culture—one usually ...

Partway down the list of household dinosaur names, you may know the pachycephalosaurus. Even if you don’t recognize that formality, the dome-shaped head of this creature is notorious, much thanks to ...

Pachycephalosaurus heads only reached total lengths of two feet or so. In case you’re curious, human men and women have an average skull thickness of 6.5 and 7.1 millimeters, respectively. 2.

The thick-skulled dinosaurs look as if they were perfectly suited to cracking heads, much like modern bighorn sheep do, but whether or not dinosaurs like Pachycephalosaurus really knocked noggins ...

A Pachycephalosaurus, photographed at the North Carolina Museum of Natural Sciences. The object tore through the roof and both floors of a two-story home. NASA will investigate whether it’s ...